Supported Models¶
Zwischen supports reviewer models from four providers. Set the model key in your settings file to the model ID.
Model list¶
Set the model key in your settings file to one of the model IDs below. gemini-3.5-flash is the default if you don't pick one during setup.
| Provider | Model ID | Context window |
|---|---|---|
| Anthropic | claude-fable-5 |
~1M |
claude-opus-4-8 |
~1M | |
claude-sonnet-4-6 |
~1M | |
claude-haiku-4-5 |
200K | |
gemini-3.5-flash |
~1M | |
gemini-3.1-pro-preview |
~1M | |
| OpenAI | gpt-5.5 |
~1M |
gpt-5.4 |
~1M | |
gpt-5-mini |
400K | |
| DeepSeek | deepseek-v4-pro |
~1M |
deepseek-v4-flash |
~1M |
Authentication¶
Each provider requires its own API key. Run zwischen auth to set up credentials, or set the provider's environment variable directly:
| Provider | Environment variable |
|---|---|
| Anthropic | ANTHROPIC_API_KEY |
GEMINI_API_KEY |
|
| OpenAI | OPENAI_API_KEY |
| DeepSeek | DEEPSEEK_API_KEY |
OpenAI also supports OAuth authentication (auth_mode: oauth). See Models and Auth.
Model tuning¶
Different models behave differently as reviewers. Zwischen Labs maintains provider-specific and model-specific prompt adjustments that account for these behavioral differences. These are applied automatically when model_tuning: true (the default).
Set model_tuning: false to disable adjustments and use the base reviewer prompt.